反应详情

温度

100 °C

To a pressure flask were charged compound tert-butyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-6-bromo-3-(6-phenylpyridin-3-yl)pyrazolo[1,5-a]pyrimidin-5-yl)piperidine-1-carboxylate (13.66 g, 16.86 mmol), tributyl(1-ethoxyvinyl)tin (11.4 mL, 33.74 mmols) and dioxane (150 ml). The flask was degassed with Ar briefly, capped and heated at 100° C. with stirring overnight. After cooling, the reaction mixture was concentrated. The residue was taken into ether (200 ml), washed with 0.5 M KF (50 ml), brine and dried (MgSO4). After solvent was removed under reduced pressure, the residue was purified on silica. Elution with DOM in hexanes (0-30%) gave compound tert-butyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-6-(1-ethoxyvinyl)-3-(6-phenylpyridin-3-yl)pyrazolo[1,5-a]pyrimidin-5-yl)piperidine-1-carboxylate (11.55 g, 85%).

1. customThe flask was degassed with Ar briefly
2. customcapped
3. temperatureAfter cooling
4. concentrationthe reaction mixture was concentrated
5. washwashed with 0.5 M KF (50 ml), brine
6. dry with materialdried (MgSO4)
7. customAfter solvent was removed under reduced pressure
8. customthe residue was purified on silica
9. washElution with DOM in hexanes (0-30%)